JPH04126760U - Intermediate storage tank for coating equipment - Google Patents

Abstract

(57) [Summary] [Purpose] To enable efficient paint supply work by changing the amount of paint stored according to the area to be painted, and to simplify the structure. [Structure] A storage chamber 48, a piston 50 disposed in the storage chamber 48, a rod 52 protruding from an end of the piston 50 to the outside of the storage chamber 48, and a rod 52 on the outer periphery of the rod 52. a hollow rod 58 that is disposed so as to be relatively movable in the axial direction and provided with a bulge 56 that can be freely engaged with the cover member 54;
2 and the hollow rod 58, the detection dogs 60 and 62 are provided for detecting the forward and backward positions of the piston 50.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is an intermediate storage for coating equipment that can change the amount of paint stored according to the object to be painted. Regarding tanks.

0002

[Conventional technology]

Conventionally, high voltage is applied directly to conductive paint to generate static electricity on objects to be painted, such as automobile bodies. For example, a voltage block method is known as a method for applying coating. this method , once a conductive paint is introduced into an intermediate reservoir that is insulated from ground potential. From this intermediate reservoir, the paint is then fed through the paint path to the paint gun, which is at a high potential. Due to this, electrostatic painting work is being performed on objects to be painted.

0003 In this case, the intermediate storage tank usually has a storage chamber with a fixed capacity, and the configured to deliver a fixed amount of paint to the paint gun via a displacing piston. Ru.

0004

[Problem that the idea aims to solve]

By the way, depending on the shape and dimensions of the area to be painted, a relatively small amount of paint may be applied to the painting gun. In some cases, it is sufficient to simply supply paint, but with the above conventional technology, excess paint is The problem has been pointed out that it is inefficient. So, inside means for measuring the amount of paint supplied to the intermediate storage tank; and a means for measuring the amount of paint supplied to the intermediate storage tank; Devices are known that have a means for confirming that paint has been supplied, but the structure There are problems in that the system becomes complicated and the entire device becomes expensive.

[0005] The present invention solves this type of problem by storing paint according to the area to be painted. It not only enables efficient paint supply work by changing the amount of retention, but also simplifies the structure. An object of the present invention is to provide an intermediate storage tank for a coating device that can be used in a painting device.

[0006]

[Means to solve the problem]

In order to achieve the above object, the present invention provides that when the paint is introduced from one end side, a storage chamber to which air is supplied from the other end; a piston movably arranged in the storage chamber; A rod protrudes from the end of the piston to the outside of the storage chamber toward the air supply side. and fixed to the outer periphery of the rod so as to be movable relative to the rod in the axial direction hollow rod, provided on the hollow rod between the cover member forming the storage chamber and the piston; and a bulge that can be freely engaged with the cover member; The rod is provided on the rod and the hollow rod to detect the forward and backward positions of the piston. and a detection means for detecting the detection result.

[0007]

[Effect]

In the above-mentioned intermediate storage tank for coating equipment according to the present invention, the paint is introduced from one end side of the storage chamber. The rod and hollow rod move together with the piston. The retracted position of the piston is detected through a detection means provided in the hollow rod of the piston. be done. Next, the piston is moved forward by air supplied from the other end of the storage chamber. The paint in this storage chamber is supplied to the paint gun, and a The forward position of this piston is detected via the detection means. where the rod and hollow When the relative axial position with the rod is changed, the stroke of the piston increases or decreases. This allows the amount of paint stored in the storage chamber to vary depending on the desired area to be painted. It will be changed.

[0008]

【Example】

Examples of the intermediate storage tank for coating equipment according to the present invention are given, and please refer to the attached drawings. and will be explained below.

[0009] In FIG. 2, reference numeral 10 indicates an electrostatic coating device, and this electrostatic coating device 10 is equipped with an intermediate storage tank 12 according to this embodiment, which is connected to a color change valve mechanism (not shown), etc. When a coating gun 16 is connected to this intermediate storage tank 12 via a four-way switching valve 14, Both are fixed in an upright position by a holding device 18.

0010 As shown in FIG. 1, the intermediate storage tank 12 is a pipe body to which a plurality of pipe bodies can be connected from the outside. A manifold base 22 having a connecting portion 20 and made of an electrically insulating material; A storage section 24 is provided integrally with the mold base 22 and temporarily stores the conductive paint. , are spaced apart from each other by ensuring a predetermined distance, and are arranged along the storage section 24. an insulating mechanism 30 having a set of three-way switching valves 26 and 28; a cover made of an electrically insulating material that is attached to the manifold base 22 to cover the equipment including the - members 32a and 32b.

[0011] This manifold base 22 has a storage section 24 in addition to a tube connection section 20 which will be described later. The outer wall portion 34 and the equipment mounting portions 36a to 36d are integrally molded, and , at both ends of this pipe body connection part 20, for fixing the cover members 32a, 32b. Threaded portions 38a, 38b are formed. The equipment mounting parts 36a and 36b are insulated. The three-way switching valves 26, 28 that constitute the mechanism 30 are fixed, and the three-way switching valves 26, 2 An insulating tube 40 having a length capable of insulating a predetermined high voltage is placed between the two.

0012 The paint is introduced into the storage part 24 from the first cylinder chamber (one end side) 44, and , a storage chamber 48 to which air is supplied from the second cylinder chamber (other end side) 46; A piston 50 is movably disposed in the chamber 48, and an air is ejected from the end of the piston 50. a rod 52 that protrudes outside of the storage chamber 48 toward the supply side; 52, and is arranged so as to be movable relative to the rod 52 in the axial direction. Also, it is located between the cover member 54 forming the storage chamber 48 and the piston 50. A hollow rod 58 provided with a bulge 56 that can be freely engaged with the cover member 54; A sensor is provided on the rod 52 and the hollow rod 58 to detect the forward and backward positions of the piston 50. Detection dogs (detection means) 60 and 62 are provided for the detection.

[0013] A threaded portion 64 is formed on the outer periphery of the rod 52. A tank 66 for storing cleaning fluid is provided, and a predetermined portion of this tank 66 is A detection dog 60 is formed at the bottom. A hollow rod sheathed on this rod 52 The detection dog 62 is located at a small diameter portion 67 at the upper end of the dog 58 that protrudes to the outside of the storage chamber 48. A threaded groove 6 is provided on the exterior and engages with the threaded portion 64 on the inner periphery of this small diameter portion 67. 8 is formed. Engages with this threaded portion 64 to press and support the end face of the detection dog 62. The rod 52 and the hollow rod 58 are fixed to each other by the nut member 70 that holds the rod 52 and the hollow rod 58. Ru.

[0014] Opening/closing valves 72b, 72a are engaged with the detection dogs 60, 62 and driven to switch. , is fixed to the equipment mounting portion 36c of the manifold base 22 via the mounting member 74. Ru. The equipment mounting portion 36d of the manifold base 22 is provided with the first cylinder of the storage portion 24. A flow control valve 76 communicating with the cylinder chamber 44 and controlling the amount of paint discharged is fixed. It will be done.

[0015] The flow path system of this intermediate storage tank 12 will be explained below using FIG. 3.

[0016] A paint inlet 7 is provided in the pipe connection portion 20 formed at the end of the manifold base 22. 8 and a cleaning liquid inlet 80 are provided adjacent to each other. The liquid inlet 80 communicates with each port of the three-way switching valve 26. These three sides The three-way switching valve 28, which communicates with the switching valve 26 via the insulating pipe 40, has a pipe body connecting portion 20. The cleaning liquid outlet 82 opens at It selectively communicates with the feed flow path 84 . This first cylinder chamber 44 includes a flow control valve 7. A paint flow path 86 communicates with the pipe body connection part 6. It communicates with a paint outlet 88 which opens at 20.

[0017] The pipe body connection part 20 has a structure for displacing the piston 50 toward the first cylinder chamber 44. The first driving air port 90, the three-way switching valves 26, 28, and the flow rate control valve 76 are driven. A second drive air port 92 to a fourth drive air port 96 are formed. This tube The connection part 20 has a valve for introducing and extracting air for detection into the on-off valves 72a and 72b. Air inlets 98a, 98b and air outlets 100a, 100b are provided.

[0018] The holding device 18 includes a bolt member 102a provided on the outer wall of the intermediate storage tank 12, 102b, and a frame 104 having a shape corresponding to the external shape of the intermediate storage tank 12. and is provided on this frame 104 to engage the bolt members 102a and 102b. grooves 106a and 106b for holding the intermediate storage tank 12 in an upright position. , this frame 104 is fixed to a wall (not shown) in the workshop.

[0019] Next, regarding the operation of the intermediate storage tank 12 configured in this way, the electrostatic coating device 1 This will be explained in relation to 0.

[0020] First, the paint inlet 78 is connected to the color change valve mechanism, and the cleaning liquid inlet 80 is connected to the cleaning valve. At the same time, the cleaning liquid outlet 82 is connected to the waste liquid tank. Paint outlet 88 It communicates with the painting gun 16 via the four-way switching valve 14, while the first driving air port 90 through A fourth drive air port 96 is connected to an air supply source. Furthermore, the air inlet 98a The air outlet 100a, the air inlet 98b, and the air outlet 100b are connected to the detection section.

[0021] Therefore, when performing electrostatic painting using the electrostatic painting device 10, a predetermined color is selected from the color change valve mechanism. When the paint is pumped into the paint inlet 78, the paint is insulated from the three-way switching valve 26. The paint is supplied through the pipe 40 to the three-way switching valve 28 and from the paint flow path 84 to the first part of the reservoir 24. The cylinder chamber 44 is filled. The paint filled in this first cylinder chamber 44 is After being sent from the paint flow path 86 to the four-way switching valve 14 via the paint outlet 88, the paint gun Filled up to 16. At that time, the piston 50 and the hollow rod 5 are filled with paint. 8 is raised integrally with the detection device provided at the small diameter portion 67 of this hollow rod 58. When the paint dog 62 engages with the on-off valve 72a and the storage chamber 48 is filled with a predetermined amount of paint. is automatically detected. Furthermore, an expansion provided at the lower end of the hollow rod 58 The projecting portion 56 engages with the cover member 54 to prevent the piston 50 from rising. Therefore, the desired amount of paint can be accurately filled into the storage chamber 48.

[0022] Driving air is then supplied from the air supply source to the second and third driving air ports 92, 94. The switching operation of the three-way switching valves 26 and 28 that constitute the insulation mechanism 30 is performed. Ru. Therefore, the cleaning liquid supplied from the cleaning valve is switched from the cleaning liquid inlet 80 to the three-way switch. The waste is discharged through the cleaning fluid outlet 82 through the valve 26, the insulating pipe 40 and the three-way switching valve 28. It is discharged into the liquid tank. Then, this insulation mechanism 30 is dried, and thereby the color change valve machine The structure and intermediate storage tank 12 are electrically insulated.

[0023] Here, driving air is supplied from the air supply source to the first driving air port 90, and the piston The cylinder 50 is displaced to the first cylinder chamber 44 side, and the paint is discharged by the flow control valve 76. The amount is adjusted and the high voltage is directly applied from the paint gun 16. is supplied to the workpiece that does not work. At that time, the piston 50 moves to the first cylinder chamber 44 side. The detection dog 60 engages the on-off valve 72b, and the movement information of the piston 50 is automatically transmitted. detected.

[0024] In this case, in this embodiment, for example, when painting different workpieces, The amount of paint supplied to the gun 16 can be easily changed. In other words, the cover part After removing the material 32b from the manifold base 22, the rod 52 and the hollow rod 5 are removed. 8 while rotating the nut member 70 that fixes them to each other in the loosening direction, This rod 52 is rotated in a predetermined direction. For this reason, the rod 52 and the hollow rod 58 moves relative to each other in the axial direction, and the positions of the rod 52 and the hollow rod 58 are adjusted. After the rod 52 and the hollow rod 58 are aligned, tighten the nut member 70 to connect the rod 52 and the hollow rod 58. fix each other.

[0025] Here, the detection dog 62 attached to the hollow rod 58 and the on-off valve 72a are engaged. This position is the retracted position of the piston 50, and is This causes the retracted position of the piston 50 in the storage chamber 48 to be changed. For example, fig. 4, if the piston 50 is moved to the first cylinder chamber 44 side, the rod 52 detection dog 60 moves toward the on-off valve 72b side to detect the forward and backward movement distance of this piston 50. becomes shorter. For this reason, the amount of paint stored in the storage chamber 48 is reduced, and the paint is transferred to the paint gun 16. The amount of paint supplied will be reduced. At that time, the hollow rod 58 has a bulge 56 is provided, and when this bulge portion 56 engages with the cover member 54, the pin is removed. The stone 50 does not move beyond a predetermined retreat position (raised position), and the storage chamber 4 8 can be reliably and accurately filled with a desired amount of paint.

[0026] In this way, in this embodiment, the rod 52 and the hollow rod 58 are rotated relative to each other. By simply changing the retracted position of the piston 50, the paint stored in the storage chamber 48 can be removed. The effect is that the amount of can be easily and accurately changed. Therefore, It is possible to supply the desired amount of paint to the painting gun 16 according to the shape and dimensions of the workpiece. It has the advantage of being able to perform efficient painting work on a variety of workpieces. can get.

[0027] Moreover, compared to conventional equipment equipped with a paint measuring means and a paint supply confirmation means, the structure is structure is simplified at once, the entire intermediate storage tank 12 can be easily downsized, and this This has the effect that the intermediate storage tank 12 can be manufactured economically.

[0028]

[Effect of the idea]

According to the intermediate storage tank for a coating device according to the present invention, the following effects can be obtained.

[0029] By changing the relative axial position of the rod and hollow rod, the piston The moving distance of the paint is increased or decreased, thereby adjusting the amount of paint stored in the reservoir to the desired coating. It can be changed depending on the part to be installed. Moreover, it has an extremely simple configuration, and the coating The amount of paint supplied to the tank can be reliably and easily changed depending on the area to be painted. This makes it possible to carry out efficient painting work on various parts to be painted. .

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view of an intermediate storage tank for a coating device according to the present invention.

FIG. 2 is a schematic perspective view of an electrostatic coating device and a holding device incorporating the intermediate storage tank.

FIG. 3 is an explanatory diagram of a flow path system of the intermediate storage tank.

FIG. 4 is an explanatory diagram of the adjustment work of the storage section constituting the intermediate storage tank.

[Explanation of symbols]

10...Electrostatic coating device 12...Intermediate storage tank 16...painting gun 18... Holding device 20...Pipe connection part 22...Manifold base 24...Storage part 30...Insulation mechanism 32a, 32b...Cover member 44, 46...Cylinder chamber 48...Storage chamber 50...Piston 52...Rod 54...Cover member 56...bulge 58...Hollow rod 60, 62...detection dog 64...Threaded part 68...Thread groove 72a, 72b...on/off valve

Claims (2)

[Scope of utility model registration request] 1. A storage chamber into which paint is introduced from one end and air is supplied from the other end, a piston movably disposed in the storage chamber, and an air supply side from the end of the piston. a rod protruding toward the outside of the storage chamber; a hollow rod fixed to the outer periphery of the rod so as to be movable relative to the rod in the axial direction; and a cover member and a piston forming the storage chamber. a bulge provided on the hollow rod and capable of engaging with the cover member; and a detection means provided on the rod and the hollow rod for detecting forward and backward positions of the piston. An intermediate storage tank for a coating device characterized by: 2. The intermediate storage tank according to claim 1, wherein a threaded portion is formed on the outer periphery of the rod, and a threaded groove that engages with the threaded portion is formed on the inner periphery of the hollow rod. Intermediate storage tank for coating equipment.